• 디자인융복합연구
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• 제17권3호
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• pp.55-70
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• 2018

이 연구는 하지장애인의 보행보조를 위한 목발 디자인의 가이드라인을 개발하고 그것을 적용한 사례에 관한 장기 프로젝트의 후반부에 해당한다. 다학제적 융합연구를 통하여 목발보행에 관한 객관적인 결과를 도출하고 이를 토대로 현실적인 대안을 제시하고자 한 이 연구의 구체적인 목표는 목발을 이용한 보행 특성에 부합하고 산업 측면에서 활용성이 높은 양산형 목발의 디자인 개발과 프로토타입 제작에 있다. 연구의 결과로 개발된 혁신적인 목발인 토고(TOGO)는 (1)목발 팁과 겨드랑이 받침대의 형태 및 구조 개선을 통해 목발이 지면과의 접촉으로 발생하는 충격의 전달 최소화, (2) 보행 중 사용자의 신체에 합리적으로 대응하는 인체공학적 구조, (3)알루미늄 압출 성형에 의한 프레임 제작과 구조 개선으로 목발을 사용하지 않을 경우 휴대성·이동성을 위한 쉽고 빠른 목발의 길이 조절, (4)보행 중 안전상 위험요소 최소화 및 (5)사용자가 자존감을 지킬 수 있게 충분히 매력적인 형태 등이 특징이다. 연구 성과로 도출된 새로운 목발은 특허 출원이 완료되었으며, 현재 대량생산 환경에서 발생할 수 있는 잠재적인 문제 검토에 이어 양산을 위한 기업 탐색과 실용화 방안을 모색하고 있다.

• 대한물리치료과학회지
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• 제3권4호
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• pp.113-120
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• 1996

The purpose of this study was to comparison clinical applied versus theoretical fitness on axillary crutch in human stance phase. Ideal crutch length is defined as the length of the crutch, including accessories, obtained during stance when the crutch tip is 15 cm(about 6inch) lateral and 15 cm(about 6 inch) anterior to the fifth toe and the axillary pad is 5 cm(about 2 inch) below the axillay fold. The participations(volunteers) were 71 inpatients(53 men and 18 women) who have orthopedic and neurological impairment on unilateral and/or bilateral lower extrimities, and mean age was 31.4 year old. Prior to participation, each subject informed the procedures of experiment from researcher and assistant researcher. This measured for axillary crutch using each of the following aspects : (1) length of actual using crutch, (2) length of axillary fold after modified(77% of actual height), (3) angle of elbow flexion after modified(77% of actual height). In order to determine the statistical significance of result, t-test were applied at the 0.05 level of significance. The result were as follows ; 1. There was significant difference between actual crutch and ideal crutch length(77% of actual height)(p<0.05). 2. There was significant difference of length of axillary fold between actual and ideal crutch (77% of actual height)(p<0.05). 3. There was significant difference of angle of elbow flexion between actual and ideal crutch(77% of actual height)(p<0.05).

• 디자인융복합연구
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• 제15권6호
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• pp.243-253
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• 2016

이 연구는 하지에 장애가 있는 사람들의 보행 보조기기인 목발과 목발을 이용한 보행에 관한 것으로 인간의 보행특성에 적합한 합리적인 목발 개발을 위한 장기 연구의 일부분이다. 연구에서는 선행연구에서 개발된 목발디자인의 가이드라인을 활용하여 현재 널리 사용되고 있는 3종의 겨드랑이 목발을 비교 평가 하였다. 목발 사용 경험이 없는 성인 남녀 31명이 참가한 목발의 비교 평가 실험에서는 선행 연구에서 도출된 10가지의 목발 디자인 가이드라인으로 겨드랑이 목발 3종에 대하여 각각 평가하였다. 실험 결과, 각 목발에 대한 가이드라인별 사용자 평가의 전체 평균에서 Mobilegs-ultra와 In-motion Pro는 KM Crutch에 비해 현저하게 높게 나타났다. 하지만 Mobilegs-ultra와 In-motion Pro 사이에는 유의미한 차이를 보이지 않았다. 가이드라인별로 보면, 6가지의 가이드라인에 대하여 Mobilegs-ultra와 In-motion Pro는 KM Crutch보다 월등히 높게 나타났으며, 목발의 경량성과 경제성 및 시장성에 대해서는 세 목발 사이에 통계적으로 유의미한 차이를 보이지 않았다. 목발디자인 가이드라인에 대한 기존 목발의 사용자 인식수준을 규명하고자 한 이 연구의 결과는 후속연구인 목발을 이용한 보행평가실험의 결과와 종합적으로 분석되어 가이드라인이 합리적인지 평가하는 기초자료로 활용될 것으로 기대한다.

• 디자인융복합연구
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• 제14권5호
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• pp.157-169
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• 2015

이 연구에서는 건강한 성인 남성 12명이 참여하여 3종의 겨드랑이 목발(Mobilegs, KM crutch, Pro In-motion)을 사용한 보행에서 광배근과 비복근에서의 근전도 반응과 보행에서의 편안함과 사용 편이성을 중심으로 한 사용자 인식 평가 실험을 수행하였다. 실험 결과, 광배근에서는 목발 사이에 통계적으로 유의한 차이가 없지만 비복근에서는 Mobilegs와 Pro In-motion이 KM crutch에 비해 현저히 낮은 활성도를 보였다. 이것은 Mobilegs와 Pro In-motion은 각각 겨드랑이 받침대 하단과 목발 하단에 스프링이 장착되어 있어 비복근에 요구되는 힘이 적은 것으로 추론할 수 있다. 사용자 인식 평가에서 Mobilegs는 보행 시 편안함과 사용 편이성에 대해 모두 다른 목발들에 비해 현저히 높은 결과를 보였다. 이것은 목발 보행 시 많은 힘이 집중되어 다양한 문제를 유발시키는 겨드랑이 받침대와 손잡이의 디자인 때문으로 추론할 수 있다. 종합적으로 볼 때, 연구의 결과는 스프링이 장착된 목발을 이용한 보행에서 비복근에서 적은 힘이 요구되어 보다 쉬운 보행을 가능케 함을 보여준다. 또한 이러한 목발의 디자인 특성은 근육에 요구되는 힘을 줄이고, 여기에 겨드랑이 받침대와 목발 손잡이의 합리적인 구조와 형태가 보태질 경우 사용자들은 그 목발을 사용한 보행에서 전체적으로 매우 편안하게 인식함을 알 수 있다.

• 대한족부족관절학회지
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• 제22권3호
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• pp.100-104
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• 2018

Purpose: An axillary crutch is the most commonly used assistive device in foot and ankle patients who require nonweightbearing. On the other hand, its use frequently induces axillary or wrist pain and critical neurovascular injuries have been reported in several studies. This study compared the clinical outcomes of patients using the knee walker and axillary crutch. Materials and Methods: A retrospective analysis was performed comparing the utility of a knee walker and axillary crutch as a nonweightbearing ambulatory aid for 62 foot and ankle patients treated between November 2016 and March 2018. A comparative study of the two orthosis could be performed because all the patients temporarily used an axillary crutch before or after the use of a knee walker. A demographic study and comparative analysis based on the visual analogue scale (VAS) satisfaction score (0~100), complications, and fall down history were evaluated. Furthermore, under the assumption of having retreatment, their preference of orthosis between the knee walker and axillary crutch was investigated. Results: The mean age of the patients was 36.5 and the mean duration of ambulation with a knee walker and axillary crutch were 5.2 and 2.4 weeks. The VAS satisfaction score of the knee walker and crutch was 88.8 and 27.5, respectively (p<0.05). The most frequent complications of the knee walker and crutch were ipsilateral knee pain (6 cases) and axillary or wrist pain (56 cases), respectively. No case of falling down occurred during knee walker ambulation, but there were two cases of crutch ambulation. Fifty-eight patients (93.5%) preferred the knee walker and four patients (6.5%) preferred a crutch. Conclusion: Compared to the axillary crutch, the knee walker afforded lower complication and higher satisfaction. Most patients preferred the knee walker to a crutch. Therefore, the knee walker is an efficient and safe orthosis for foot and ankle patients who require nonweightbearing.

• 한국전문물리치료학회지
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• 제20권1호
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• pp.55-63
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• 2013

This study investigated the effects of axillary crutch length on trunk muscle activity and lumbo-pelvic-hip complex movements during crutch gait. Eleven healthy men participated in this study. The participants performed a three-point gait with optimal, shorter, and longer crutch lengths. Weight-bearing (WB) side was determined as the dominant leg side. The electromyography (EMG) activity of the bilateral rectus abdominis (RA) and erector spinae (ES) muscles and lumbo-pelvic-hip complex movements were monitored using a three-dimensional motion system with wireless surface EMG. Differences in the EMG activity of RA and ES muscles and range of motion (ROM) of lumbar spine, pelvis, and hip among conditions were analyzed using one-way repeated-measures analysis of variance, and a Bonferroni correction was conducted. There was less RA muscle activity on the WB side under the optimal crutch length condition compared with shorter and longer crutch length conditions (p<.05). The EMG activity of the RA muscle on the non-WB side and ES muscle on the WB side were significantly decreased under the optimal crutch length condition compared with shorter crutch length condition (p<.05). No significant differences in the EMG activity of the ES muscle on the non-WB side and ROM of lumbo-pelvic-hip complex were found among conditions (p>.05). These findings indicate that the optimal crutch length improves the trunk muscle efficiency during crutch gait.

• 대한물리치료과학회지
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• 제4권1호
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• pp.243-253
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• 1997

The purpose of this study was to determine the effect of systolic blood pressure, heart rate and myocardial oxygen consumption on 3-point nonweight bearing ambulation with axillary wooden crutch according to age. The subjects were fifty healty volunteers(22 male, 28 female), ages from 20 to 69(mean age of 43.8 years) with no history of cardiovascular or respiratory disease, diabetes mellitus, arthritis and orthopedic disorder within the past three years. This study was carried out from May 10 to August 10, 1996. The data were analyzed by percentage, mean and standard deviation and ANOVA. The results were as follows : 1. In systolic blood pressure(SBP), there was no significantly change between before walk and after 20 m in crutch walking with age, however, there did differ significantly after 40 m and 60 m in crutch walking(p<0.01, p<0.001). 2. In heat rate(HR), there was no significantly change between before walk and after 20 m, 40 m in crutch walking with age, however, there did differ significantly after 60 m in crutch walking(p<0.05). 3. In myocardial oxygen consumption($MVO_{2}$), there was no significantly change between before walk and after 20m in crutch walking with age, however, there did differ significantly after 40 m and 60 m in crutch walking(p<0.01, p<0.001). These result showed that cardiovascular system had a great effect on the olderly when 3-point nonweight bearing ambulation with axillary wooden crutch. Therefore, when train for axillary crutch in the olderly, we needed suitably basis of walking distance.

• 한국전문물리치료학회지
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• 제3권1호
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• pp.24-31
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• 1996

The purpose of this study was to determine which of several crutch-fitting techniques best predicts ideal crutch length. Ideal crutch length is defined as the length of the crutch, including accessories, obtained during stance when the crutch tip is 6 inches (15.2 cm) lateral and 6 inches(15.2 cm) anterior to the fifth toe and the axillary pad is 2.5 inches(6.4 cm) below the axillary fold. Forty four volunteers were measured for crutches using each of the following methods:(1) 77% of actual height, (2) actual height minus 40.6 cm, (3) actual height minus 45.7 cm, (4) olecranon to opposite third finger tip, (5) olecranon to opposite fifth finger tip, (6) 77% of arm span, (7) arm span minus 40.6 cm, (8) anterior axillary fold to heel plus 5.1 cm, (9) anterior axillary fold to heel plus 10.2 cm, (10) ideal crutch length. Of the techniques studied, the two involving anterior axillary fold to heel were found to be good predictors: anterior axillary fold to heel plus 5.1 cm and anterior axillary fold to heel plus 10.2 cm. Finally, two additional length estimates were derived using linear regression analyses. These estimates provided the best overall predictors based on anterior axillary fold to heel and actual height.

• 대한물리의학회지
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• 제15권1호
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• pp.77-84
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• 2020

PURPOSE: This study compared the activities of the trunk muscles during crutch walking to determine which of the crutch length measurements is most beneficial. METHODS: Twenty young women volunteered to participate in this study. After adjusting crutch length, the participants performed a three-point walking with nondominant leg limited in weight bearing. This study used six crutch length measurements: (1) Height-40.6cm, (2) Height'.77, (3) Olecranon-to-finger length, (4) Axillary-toheel length, (5) Arm-span length-40.6cm, and (6) Arm-span length'.77. The EMG activities of the internal oblique (IO), rectus abdominis (RA), multifidus (MF), and erector spinae (ES), muscles on the weight bearing side were monitored using wireless surface EMG. RESULTS: The EMG activities of the RA and ES appeared to be significantly different among the crutch length measurements (p<.05). The post-hoc test showed that the 'Arm-span length-40.6cm' was significantly greater in the RA activity when compared to the 'Height'.77' and 'Axillary-to-heel length' measurements, and in the ES activity when compared to 'Height'.77' measurements. Furthermore, IO/RA and MF/ES ratios showed significant differences among the crutch length measurements (p<.05). In the post-hoc test, significant difference was observed between 'Olecranon-to-finger length' and 'Arm-span length-40.6cm' for the IO/RA ratio, and between 'Height'.77' and 'Olecranon-to-finger length' and between 'Height'.77' and 'Arm-span length-40.6cm' measurement for the MF/ES ratio. CONCLUSION: These findings suggest that the 'Height'.77' measurement is relatively advantageous to optimize the activities of trunk muscles during the crutch walking, and allow simple measurements of the crutch length.

• 로봇학회논문지
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• 제9권3호
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• pp.133-139
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• 2014

This paper proposes a wearable and motorized crutch control system for the patients using the conventional crutches. The conventional crutches have a few disadvantages such as the inconvenience caused by the direct contact between the ground and the armpit of the patients, and unstable gait patterns. In order to resolve these problems, the motorized crutch is designed as a wearable type on an injured lower limb. In other words, the crutch makes the lower limb to be moved forward while supporting the body weight, protecting the lower limb with frames, and rotating a roller equipped on the bottom of the frames. Also the crutch is controlled using the electromyography and two force sensing resistor (FSR) sensors. The electromyography is used to extract the walking intention from the patient and the FSR sensors to classify the stance and swing phases while walking. As a result, the developed crutch makes the patients walk enabling both hands to be free, as if normal people do.